Nice. Price is OK at 9000 yen (93 AUD or 60 USD)
https://page.auctions.yahoo.co.jp/jp/auction/j1101944751These are definitely for the B210. Fitted to GX and Coupe dash, or to the long console. Listing says they are "warehouse sorting items", so perhaps they are new old stock. Some corrosion but i think they would clean up well
24845-H5500 METER ASS'Y-ampere
24870-H5500 GAUGE ASS'Y-oil pressure
08510-51242 SCREW-Tapping screw, Pan head 5x12mm 4
These were in the
* Dash for Sedan GX
* Dash for Coupe
* stock in the long console for Excellent GL
*
Genuine Option Parts catalog for the long console
The oil pressure gauge uses a 240Z-style pressure sender out at the engine
To fit the console, make up a bracket. Here's the factory bracket:

PB210 option DX, GX
21 74982-H5927 MASK KIT-console box with screw (Brown)
22 24870-H5500 GAUGE-oil pressure
23 24845-H5500 METER-ampere
24 25070-89901
UNIT-oil pressure gauge